The following code throws NullPointerException: int num = Int开发者_运维问答eger.getInteger(\"123\");
Eventually I got the answer, but it puzzled me for a while. Why does the following code throws NullPointerException when run?
according to the documentation, the method String.valueOf(Object obj) returns: if the argument is null, then a string equal to \"null\"; otherwise, the value of obj.toString() is returned.
I have been slowing learning and building my first android app. I\'m VERY new to java but have already done a couple of projects in C#, VB.NET (back in the day), Objective-C (have 6 apps in the store)
I\'ve got an interface: package com.aex; import javax.jws.WebParam; public interface IFonds { double getKoers();
I show a JFileChooser with this snippet: public File getDestination() { JFileChooser chooser = new JFileChooser();
import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.io.*; import java.net.*; import java.util.*;
I cannot for the life of me figure out why I\'m getting a NullPointerException. When a user clicks on a particular image, a dialog window is supposed to pop-up and display a larger version of said im
I\'m wondering if it is an accepted practice or not to avoid multiple calls on the same line with respect to possible NPEs, and if so in what circumstances. For example:
I\'m trying to add multiple markers to my GWT-Map. If I do it with the geocoder, it works just fine... But I also get the values from a database, so I can place them via Lat Lng.
加载中,请稍侯......